package uilayout

import "fyne.io/fyne/v2"

type Margin struct {
	top    float32
	bottom float32
	left   float32
	right  float32
}

func NewMargin(
	top, bottom, left, right float32,
) *Margin {
	return &Margin{
		top:    top,
		bottom: bottom,
		left:   left,
		right:  right,
	}
}

func (m *Margin) MinSize(objects []fyne.CanvasObject) fyne.Size {
	w := m.left + m.right
	h := m.top + m.bottom
	if len(objects) > 0 {
		w += objects[0].MinSize().Width
		h += objects[0].MinSize().Height
	}
	return fyne.NewSize(w, h)
}

func (m *Margin) Layout(
	objects []fyne.CanvasObject,
	containerSize fyne.Size,
) {
	pos := fyne.NewPos(m.left, m.top)
	if len(objects) > 0 {
		o := objects[0]
		size := containerSize.Subtract(
			fyne.NewSize(m.left+m.right, m.top+m.bottom))
		o.Resize(size)
		o.Move(pos)
	}
}